Seculative resource prefetching for URLs CL.

chrome/browser/predictors/resource_prefetch_common.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_COMMON_H_
+#define CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_COMMON_H_
+#pragma once
+
+#include "base/time.h"
+#include "googleurl/src/gurl.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace predictors {
+
+// Represents a single navigation for a render view.
+struct NavigationID {
+  // TODO(shishir): Maybe take process_id, view_id and url as input in
+  // constructor.
+  NavigationID();
+  NavigationID(const NavigationID& other);
+  explicit NavigationID(const content::WebContents& web_contents);
+  bool operator<(const NavigationID& rhs) const;
+  bool operator==(const NavigationID& rhs) const;
+
+  bool IsSameRenderer(const NavigationID& other) const;
+
+  // Returns true iff the render_process_id_, render_view_id_ and
+  // main_frame_url_ has been set correctly.
+  bool is_valid() const;
+
+  int render_process_id;
+  int render_view_id;
+  GURL main_frame_url;
+
+  // NOTE: Even though we store the creation time here, it is not used during
+  // comparison of two NavigationIDs because it cannot always be determined
+  // correctly.
+  base::TimeTicks creation_time;
+};
+
+}  // namespace predictors
+
+#endif  // CHROME_BROWSER_PREDICTORS_RESOURCE_PREFETCH_COMMON_H_